I'm a member at an indoor range with a 100yd rifle bay... did not get to shoot the 7" or the 10.5" for groups at 50 and 100 as the bay was undergoing maintenance... will try next week... that will be the deciding factor of the 7 or 10.5....I'm not sure I can get under 6" groups with the short barrel at that distance...the pistol does function so far with an H1 buffer, but have less than 80 rounds through it
I have an extra Glock lower for a 9mm PCC and extra 16" barrel that I may chop to around 8"... well, just because I can
re: pistol caliber carbines.... they are a lot of fun to shoot... I have a 16" and a 10.5 on my SBR...as you can use them for USPSA competition on a very frequent basis... I can shoot 3 matches a month within about a 1 1/4 hr driving time....exceptional accuracy combined with an optical sight provides superb hit quality, with relatively cheap ammo ... I'd use the same amount if I shot the match with my G34
my original design criteria was to over match an AK's accuracy at 100m with as small a platform as possible....