I’ve seen receivers marked with every year from 1945-1958 (M-43s can go as early as 1943, and Spanish Navy rifles were made into the 1960s, including in 7.62 NATO rather than 7.92). It should be noted that the date on the receiver is the date of manufacture as an M-43. I have never seen a chamber casting of one of these with a locked up bolt BUT I would expect to see an oversized chamber diameter as well. Constant operation at or exceeding the upward limit of a design criteria is a recipe for disaster, for the M93 Mauser design and 7.62 NATO it generally means that due to failure of the receiver metal elasticity (no rebound) the locking lugs in the receiver will deform and bolt will slowly become harder and harder to unlock as it is set back into the receiver lugs and the rifle brass flows to fill the gap eventually locking the bolt into the receiver. Based on that design criteria the design to pressure spec for the M93 Mauser design is 51,000 x. Most designers of military firearms use a 20% overbuild as a design criteria because that once a military cartridge comes out seldom if ever does the max chamber pressure change. 308 Win Service Pressure Max – 62k PSI, 7.62×51 NATO Service Pressure Max – 50k CUP, or 60/61k PSI. The 7mm Mauser develops 51,000 psi or 46,000 CUP, the. The max cartridge pressures the M93 is designed around to handle repeatedly is the 7MM Mauser and it does that quite well. What was most likely being referred to was the FR7 the one based off of the M93 Mauser design. Why? Because the report is not only so egregiously loud but the muzzle-flash is bigger than your head.Ĭlue? When the person at the next shooting point puts on a motorcycle helmet, it’s time to call the range master. I have personally witnessed it several times, and usually the shooter is asked to leave by the rangemaster.
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The thing to know, however, is, every now and again, somebody shows up at the range with a full charge, short barreled carbine. Nice to know that wasn’t true, but in those halcyon past days of yore, who knew? Or for that matter, who wanted to take the chance of a permanent one-eyed pirate look? Why go to all the trouble to make a substandard item when even a small increase of effort would result in a viable and worthy full powered arm? Honestly, even then, I can recall that It didn’t think it made sense. They boiled down to nearly a single word… Well okay, a single word plus… 7.62 NATO, NO!!! Never got one back then as the cautionary warnings were quite specific. A muzzle brake was fitted so that standard 22mm NATO grenades could be launched (a further benefit for training compatibility).Ĭontrary to popular misconception, the FR-8 was designed to be used with normal full-power 7.62 NATO ammunition, not a reduced-charge specialty round. The rear sight was similarly modified to duplicate the CETME sight picture and range adjustments. Where the CETME had a charging handle tube above the barrel, the FR-8 had a similar hollow tube below the barrel, which was used for storing a cleaning kit. The original barrel was replaced with a 7.62mm barrel, along with a front sight duplicating that of the CETME. It was not possible to immediately equip everybody with the new rifles, so a parallel program was instituted to modify the now-obsolescent bolt action rifle in inventory into a more useful configuration.įR-8 was the designation for an M43 Mauser (of the model 98 pattern) rebuilt as a training and second-line rifle. Spain was not only moving to their first semiauto rifle, but also changing from 8mm Mauser to the new 7.62mm NATO. The FR-8 is a Spanish rifle manufactured in the 1950s as part of Spain’s adoption of the CETME semiautomatic rifles.
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