#MOSSBERG RETROGRADE 2020 PLUS#

At the discretion of the contractor, this test may be performed in conjunction with the endurance test (4.6.5).Īnd, always having been a big admirer of firearms made of traditional wood and steel, when I saw the “Retrograde” model of the 590A1, which comes with walnut stock and “corncob” walnut forend grip, I decided that was the one I wanted. Areas to be measured and measuring equipment used shall be approved by the Government representative.

#MOSSBERG RETROGRADE 2020 PLUS#

No measurement shall exceed initial temperature plus 40 degrees F. Immediately after completion of the firing, the temperature of representative ares of the heat shield shall be measured. Then 25 rounds of standard, commercial, 12 gauge, 2 3/4 inch, 00 buckshot (9 pellets) maximun load shells shall be fired in not more than 3 minutes (rate of fire is to be approximately 1 shot every 5 seconds). The shotgun and its ammunition shall be conditioned at 78 degrees +/- 8 degrees F for a minimum of four hours. Type I shotguns shall be tested for heat shield effectiveness (see 3.3.3.e). The ten shotguns shall then be reassembled using repair parts taken at random from each container and subjected to the functioning test of 4.6.3 and the headspace test of 4.6.2. Shotguns shall be tested for interchangeability of repair parts (see 3.18) by disassembling the shotguns and placing parts of each kind in the same container. At the test conclusion the weapon must be safe and serviceable and the primed shell shall not have fired. The drop surface shall be 85 + 5 Durometer (Shore A) rubber mat, one inch thick, backed by concrete. The weapons shall be dropped a minimum of four feet (lowest point on the weapon to the drop surface) in each of the following five modes:Ĥ5 degree angle with verticle plane- butt end down One weapon shall be conditioned at -20 degrees F, one at ambient, and one at +120 degrees F for a minimum of four hours prior to the test. Each weapon will have the safety 'on', a primed cartridge case in the chamber, and a fully loaded magazine. Type I shotguns shall include M7 bayonet and scabbard as specified in 3.3.1.a.Īfter completion of the performance test, three weapons shall be chosen and subjected to the rough handling test.

Shotguns shall be capable of withstanding the firing of 3,000 rounds with no unserviceable or broken parts and no more than three (3) malfunctions using standard commercial 12-gauge, 2 3/4 inch, 00 buckshot (9 pellets), maximum load shells. Ammunition shall be as specified in 3.17.3. The guns shall be hand held during firing, or mounted in a fixture that simulates hand firing. Five patterns shall be fired from each gun and the average must be as specified. The shot pattern shall be such that not less than 33 1/3 per cent of the shot pellets shall be within or cut the edge of a 30-inch diameter circle for accuracy (pattern), drawn entirely on the pattern sheet so as to enclose the most shot. You can find it easily if interested.Īt a range of 40 yards (+/- one foot) aim shall be taken at the center of a pattern sheet not less than 40 nor more than 60 inches square. Theres more to it than this I found the complete downloadable specs, but it’s 33 pages. I found the “cliffnotes” version posted on another forum. And yes, I’ll definitely be getting a bayonet for it! (How could you not, right?!)īut, the biggest thing is that the “A1” version of the Mossberg 590 is supposedly the only shotgun to have officially passed the so-called MIL-S-3443G specification, created to define the characteristics desired in a military fighting shotgun. And that may even be the reason behind the heavy barrel, as part of the MIL-S-3443G spec that this gun was made for defines how tight the pattern has to be at a certain distance from the muzzle (see below). One article I read even claimed that the heavier barrel actually results in a tighter pattern, due to different barrel harmonics, despite the fact that it’s a cylinder bore shotgun (no choke).

If you’re not familiar, the 590A1 differs from the standard Mossberg 590 in that it has a heavy-walled barrel, metal trigger guard and safety, Parkerized finish instead of matte blueing, and some people claim that the action of the trigger is better. Well, seeing that Mariner on sale spurred me into doing some research into what else was available, and by the time I got ready to buy, Sportsman’s Warehouse was all sold out.īut after doing some research, I found that what I really wanted was a 590A1 anyway (the ones that Sportsman’s Warehouse had on sale were the standard 590).

If you saw my recent thread about the Mossberg Mariner Marinecote you knew I was looking at shotguns.

Mossberg retrograde 2020