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LAR Grizzly Win Mag – Wikipedia
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Contents
Background[edit]
Operation[edit]
Non-standard parts[edit]
See also[edit]
References[edit]
External links[edit]
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LAR Grizzly MK IV 44 Magnum Review | Gun Reviews | Tactical Gun Review
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lar grizzly mark iv
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Lar Grizzly-Mark IV-44 magnum,6 1/2″,in box wit… for sale
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Updating SALE PENDING.This is one of the most rare models of the LAR Grizzly pistols, in the affordable-easy to find-44 magnum cartridge.st for sale by Bob Simpson on GunsAmerica – 940834427 - Table of Contents:
Bob Simpson
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L.A.R. LAR Manufacturing Mark IV Grizzly 44 Magnum Blue 5 1/4″ Ported Semi-Automatic Pistol Box & Mag | Lock, Stock & Barrel
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- Summary of article content: Articles about L.A.R. LAR Manufacturing Mark IV Grizzly 44 Magnum Blue 5 1/4″ Ported Semi-Automatic Pistol Box & Mag | Lock, Stock & Barrel Our Assessment: Essentially an over-sized 1911, the LAR Mark IV is a large-framed single-action semi-automatic pistol chambered in the powerful .44 Magnum … …
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LAR GWM Mark IV – Mythic Armory
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LAR Grizzly Win Mag Mark IV
Specifications
Patents
US Patent 4253377Firearm of interconvertible calibersFiled by Perry J Arnett October 13th 1978
Publications
The Grizzly Win Mag Instruction ManualLAR Manufacturing Inc 1989
Videos
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Lar Manufacturing Mark Iv – For Sale :: Guns.com
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Model- Mark IV
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LAR MFG. CO. Grizzly Mark IV :: Gun Values by Gun Digest
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LAR Grizzly Win Mag
Semi-automatic pistol
The Grizzly Win Mag pistols were conceived, invented, designed, engineered and developed in the 1980s by the sole inventor, Perry Arnett, who licensed his patent for an interchangeable caliber semi-automatic pistol[1] to L.A.R. Manufacturing Inc. Perry Arnett’s designs were initially flawed and were improved upon by Heinz Augat (former owner and founder of L.A.R. Manufacturing Inc.). The L.A.R. Grizzly was the most powerful semi-automatic pistol ever commercially produced after the Desert Eagle (the Mark V was chambered in .50 AE to compete with the IMI Desert Eagle).
Background [ edit ]
The LAR Grizzly pistol was a modified Colt M1911 style pistol with oversize components designed to handle larger, more powerful cartridges than could be used in the standard size 1911 pistol. The original prototype built by Perry Arnett was made from two Colt 1911 frames and slides cut and welded to accommodate the 45WM round, with two steel doubler plates welded to the slide flats to retard the action and increase strength.
Between 1983 and 1999, approximately 15,000 guns were produced in four versions capable of firing 6 different cartridges. All guns were hand fitted and capable of high accuracy.
The Grizzly is an oversize of the Colt M1911 design, and most parts are interchangeable with those of the standard size pistols of other manufacturers. The Mark I model, offered in the mid 1980s was developed to fire the powerful .45 Winchester Magnum round. At various times, conversion kits were sold allowing the pistol to fire other rounds, including .45 ACP, 10 mm Auto, and .357 Magnum. Later, the Mark IV model was designed specifically to handle high pressure .44 Magnum loads, and the Mark V was designed to chamber the still more potent .50 AE. The 357/45 Grizzly WinMag .357-.45 GWM was a powerful wildcat round designed for the LAR Grizzly pistol.[2]
The standard Grizzly models had a 5.5″ slide, most often seen fitted with a 6.5″ barrel which extends one inch beyond the slide, and less commonly with a 5.5″ barrel in combination with a factory fitted bushing style recoil compensator. Special models with 8″ and 10″ barrels for hunting and silhouette competition were also produced (in small quantities).
A Grizzly caliber conversion kit typically included a barrel, a magazine, an ejector, an extractor, a barrel bushing, and a recoil spring. Some also included a bushing type recoil compensator and a wrench for use with the compensator.
Operation [ edit ]
The standard recoil spring used in the Mark I and II pistols chambered for the .45 Winchester Magnum has a 27lb rating, compared to the 16lb rating for a standard M1911 pistol chambered for .45 ACP. The heavy spring, combined with the greater inertia of the massive slide, results in a manageable recoil impulse without resorting to the gas operation of the Desert Eagle and Wildey designs. The absence of any small, easily fouled gas ports makes the LAR Grizzly capable of firing cast lead bullets reliably.
The Grizzly utilises a standard 1911 Commander length barrel bushing to accommodate the greater excursion of the slide and associated swing of the barrel required to feed and eject the long .45 WM cartridge. In spite of this, the bushing tends to develop skirt cracks after hundreds of rounds of full-power loads. As the bushing skirt fails, the point of impact will drift downward.
The Grizzly pistol design does not utilize the double-tapered barrel tenon[3] accuracy enhancement patented by Perry Arnett.
Non-standard parts [ edit ]
Most of the small parts used in the Grizzly Mark I pistol are standard parts per the 1911 ordnance drawings. Some parts however are not interchangeable due to the increased front to rear depth of the magazine well:
Magazines — The magazine well is extended to accommodate the .45 Winchester Magnum cartridge, and the magazines are similarly deeper front to back. Magazines for 10mm and .45 ACP contain a sheet metal insert that reduces the effective cartridge length capacity of the magazine. Magazines intended to chamber the 10mm round have modified feed lips and longitudinal grooves reducing the width of the feed channel. The overall magazine dimensions are identical to the standard .45 Winchester Magnum magazine. LAR Grizzly pistols modified to accept standard 10mm magazines exist, but this was not a factory modification.
Trigger — The Grizzly trigger bow is longer than the 1911.
Extractor — The extractor head is about 0.4 inch longer than the M1911.
Firing pin — longer than the 1911.
Barrel – Longer barrel hood than the 1911.
Recoil Spring — 27 pound tension.
Plunger Spring — Longer than the 1911.
See also [ edit ]
References [ edit ]
Perry Arnett Patents at the USPTO related to the LAR Grizzly pistol:
LAR Grizzly MK IV 44 Magnum Review
By: Cary Kieffer
Long since out of production, I finally brought home an LAR MK IV Grizzly 44 Magnum! I’ve wanted one of these so bad..I’ve written letters to LAR twice with no reply, my “texter” went off at work a few weeks ago and here she is, my Grizzly 44!
I’ve wanted one of these things forever, I haven’t seen MK IV 44 magnum for sale online in about 4 years and that one went almost 2 G’s. There is only ever a handful of 45 Win mags online at any given time, so the LAR Grizzly 44 for me is a “Holy Grail” find. My good friend Mark Smith at the local Johnson’s Gun store saw it come in on consignment and knew it had my name written all over it. He text me and I couldn’t reply fast enough! As soon as we established it was in fact a 44 Mag, I said sold! No need to see it, when I went over there, I was even more impressed. So I left work at finish time, went to the store and put $300 down on it, went home and took a nap. At 430pm I woke up looked at the clock and said hell with it, that’s what plastic is for. I went back and picked up my LAR Grizzly 44. I was back 2.5 hours after the time I layed it away, I had to have her. Mark was laughing when I came back in the store “ya lasted almost 3 hours” he said. I can’t thank him enough for that text, what an impressive weapon.
This Grizzly looked brand new, it was bone dry but spotless. There aren’t any scratches and the parkerizing wasn’t worn even on the rails. It might be now because I’ve been shooting it as often as I get out to shoot (weekly) but I didn’t get it that way. So I got the original box, original factory holster, the gun of course and 3 mags. Two of which were brand new in the box. At $150 a piece I was thankful I got 3 magazines. The Grizzly came from the original owner who was an Alaska resident and spent a lot of time in the boonies. He said he had it loaded on his pack on all those trips to the bush. If he shot it much though, you couldn’t tell it. The thing is awesome, I paid $1200 and I would have paid a lot more. As far as I’m concerned, I stole this gun.
Shooting: This thing is a dream! The recoil isn’t anything, it’s a smooth shooter even with full power loads, definitely friendlier than my Smith 29 with the same loads. I have fired a bunch of PMC 180’s, which are pretty mellow, function was perfect. Winchester white box which is a tame 240 grain load were about the same, very smooth and perfectly reliable. I have also gone through a lot of Hornady 180, 200, 240 and 300 grain XTP’s. All have been accurate and flawless feeders. The old Grizzly 44 hasn’t in anyway hiccupped at all, functions flawlessly with anything you feed her. I have some Underwood hot stuff coming. I’m looking forward to seeing if the 305 grain HCFP function and shoot as well as everything else has. That one should kill most anything you ever come across.
The LAR Grizzly MK IV 44 mag is a joy to shoot, the only thing you have to do is send out a search party for your brass, she really throws em’. The first 6 in the gun will fly behind you about 35 to 40 feet and land about 4 o’clock. The last one when the slide locks flies straight back over your head and lands 6 o’clock 40 feet back. I’m just glad it keeps missing my head, they are really coming out of there. Everyone who shoots it remarks at how surprised they are at the LACK of recoil, it’s just user friendly. I’ve put 300 rounds through it and then some by 2 big dudes who are friends of mine on the local Police SWAT Team. On the flip side my girl Kelly, who is a tiny little thing with “miniature” hands, has no problem controlling the Grizzly 44 either. Kelly proves you do not have to be big, she is exceptionally strong though to be perfectly straight. Anyone I think with enough arm/hand strength to work the slide with it’s 27lb recoil spring ought to be able to handle the Grizzly 44.
Final thoughts: The trigger is great, the whole Grizzly 44 pistol just radiates quality workmanship. Of the 49 parts of the gun 39 are interchangeable with standard 1911 parts, so that’s a plus if something ever needs replaced. I SOOO wish these would go back into production, L.A.R. was just the licensed manufacturer from what I have been able to gather. The sole rights of the gun belong to a Mr. PJ Arnett, well Mr. A you built one of the coolest things I have ever owned. I hope someday someone decides to take your design into production again and does as good a job as L.A.R. did with this one. From what I understand there were only 1000 of these Grizzly MK IV 44 mags made…if you’re really lucky maybe you can be one of the other 999 to own one someday. Do not pass on it, you will regret it! Now I’m going to get greedy, the next “Holy Grail” on my list is a Grizzly MK V in 50AE. As always thanks for reading and train often.
7-3-16 Update: The Grizzly loves the 305 grain long HCFP Underwood Ammo load just as much as any smaller hollowpoint. Ran 2 boxes today. Flawless feeding and good groups. With a load like that there isn’t much alive that can’t be handled.
1-11-17 UPDATE: NEW GRIZZLY ARTICLE HERE!!! CUT AND PASTE LINK. https://tacticalgunreview.com/two-lar-grizzly-pistols-a-comparison/
10-23-16 Update:
Load Data: 300 gr XTP Bullet, 19 gr H110, CCI 350. OAL 1.6
Average Velocity 1187 fps. /938 lbs muzzle energy.
53 degree day, Caldwell G2 chrono, distance 14 feet from muzzle.
Good solid load, accurate. I feel like it could go up as max was listed as 22.5 gr H110. I might try 20 but 22.5 seems a bit extreme to me. Pretty much I was happy at 19 gr powder. As with any load data please use caution and whatever you do is on you. No liability here from misuse. Remember that the guy with online data might be the dumbest bastard you ever met….so use caution and work up.
240 gr Winchester Hollowpoint, 25 gr H110, CCI 350. OAL 1.6
AVG VEL: 1375 FPS/ 1007 LBS M.E.
180 gr Hornady XTP, 28.5 gr H110, CCI 350. OAL 1.585.
AVG VEL: 1406/785 LBS M.E.
29.5 gr = 1515 fps/917 lbs ME
30 gr = 1540 fps/947 lbs ME
30.5 gr = 1551 fps/961 lbs ME
31 gr = 1604 fps/1029 lbs ME
Light practice load: 240 gr Extreme bullet, 18-20 grains of H110, CCI 350. OAL 1.53.
Did not chrono as I didn’t care. It’s light and everybody likes it. It’s an “all day long” load. A bonus is no search party for your brass. 12 feet, 3’oclock…there they are.
A nice convo I had with a TGR reader, thanks CD! Here’s his guns and some good info!
Hello Cary.
After finding your review of the Mk4 on TGR and posting in the comments, I wanted to send you a pic and info on my rig. I’m not much of a writer or photographer but I will give some basic info.
If you choose to do so, you can show others another finish option on your review.
As I mentioned, my LAR is a hard chromed Mk1 WinMag that has been threaded and fitted with an Ed Brown Four Star comp. Purchased for $850 plus tax as shown.
I use StarLine brass and 240 gr. JHC Sierras (OAL= 1.555) over 17.3 gr. of Blue Dot when looking for my max accuracy load. I also use a lot of Nosler projectiles since they are less expensive in bulk..
I am also adding a pic of the now departed 445 for your personal amusement. The Dans were always seriously overbuilt for the caliber and this one was especially beefy.
Thanks for the review and the conversation.
Take care.
CD.
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Lar Grizzly-Mark IV-44 magnum,6 1/2″,in box wit… for sale
SALE PENDING.This is one of the most rare models of the LAR Grizzly pistols, in the affordable-easy to find-44 magnum cartridge.still looks like new,with adjustable rear target sights,wrap around rubber LAR grips,white outline rear sight,& red ramp front sight,semi automatic with one stainless magazine,6 1/2″ barrel,original LAR cardboard box,that looks like a wood case,& still has all the factory end stickers & foam insert is perfect & a like new owners manual.box shows a date of 5-28-94 on it.pistol is semi auto & single action only,with a nice gray parkerized finish & has serial # F000480. a nice clean rare Grizzly,for only $1495.firm,+$40. shipping,to your FFL dealer only.I am an FFL dealer,located in Clearwater,Florida area.I do accept US postal money orders,bank money orders & personal checks,but those do take awhile to clear.be sure to check out all my other unique listings.
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