TheNewPunisher
Member
- Joined
- May 25, 2021
- Messages
- 7
As a collector of unique looking firearms both modern and vintage, I had an instant attraction to the Polish PM-63 SMG when I first saw one. I was even more excited when I saw that Pioneer Arms released the civilian semi-auto version PM-63C here in the states. I missed out on getting one last year, but was fortunate enough to get notified earlier this year that they had again become available and I quickly snatched one up. I figured that this would be an interesting candidate for an SBR, so I submitted my Form 1 and had to wait until it went through a researching cycle (since this model wasn’t listed on the ATF manufacturer’s model list) and finally received my approval. Initially, it seemed like a relatively easy SBR conversion. Replace the non-functional folding foregrip and dremel out the small spot weld that prevents the stock from being deployed. After about a half hour or so to carefully remove the weld with minimal damage, the stock released easily. The problem is that there is nothing to prevent you from completely removing the sliding stock when pulled out. Furthermore, Pioneer Arms have apparently changed the semi version lower receiver so that none of the stock latching/retaining features found on the SMG version are on the semi version. The SMG version has a small ‘rail’ at the rear of the receiver right above the stock and a small ‘nub’ at the lower rear to keep the stock straight when pulled back. On the semi version, once pulled back, not only can it pull right out, but it also rotates in the latch and does not lock up in any way. Also, the stock lock-release button is also absent from the bottom rear of the semi version. The opening for the button on the receiver isn’t there either. So… Now what!?! Maybe should have done a bit more research before SBRing this pistol. The stock was apparently just for show on this pistol with no thought of being actually used by the average buyer. It’s too bad. It probably would have made it a lot easier and user-friendly to fire. Just seems like there would have to be too much substantial work done to modify this model for reasonable stock usage. Just an FYI for anyone contemplating this.
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