I had an Oly .45APC upper with a mag well that required the use of UZI mags. Expensive and more rare than hen's teeth even when Oly announced they were making them. Sold it to the local range for quite a profit.
Still have (you'll need to pry it out of my hands) a Rock River Arms .45APC that takes grease gun mags. Up to 50 rounds before reloading, instead of 20 out of the UZI mags. You need a fixed stock to hold the recoil buffer spring. I use the sproiiiinnnng to set the pace for "rapid" fire - I can crank out maybe 3 rounds per second but that's synchronizing perfectly. Real-world timing is 2 rounds per second.
Yes, grease gun mags get heavy if you are considering a forced march. On the other hand, I'm fantastic out to 100 yards with iron sights, scary deadly to 200 with an el-cheapo 3-9x35 scope.
.45APC out of a 16" barrel is devastaing of zombie punkins & watermelons. There have been a few woodchucks that sort of fell over as opposed to exploding, but they were all out about 100-120 yards. Did you know 'chucks are not scared by green lasers? They ought to be.
As a HD impliment it's just like carrying a M16A1 but heavier and slower.
Ballistics By The Inch http://www.ballisticsbytheinch.com/45auto.html says it's a fair round. I like it because it uses the same round as my EDC pistol - the Downsizer WSP
http://www.thefiringline.com/forums/showthread.php?t=229949 be sure to check the Auction Arms alert at the bottom of that thread. I think I may be the only known owner of one of those beasts.
stay safe.
skidmark
PS - anybody going through Richmond, Va who wants to try it out please feel free to let me know. Bring proof of current health insurance.
