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Posted: 10/29/2004 5:25:50 AM EDT
Can someone tell me which type of adapter the DPMS Rimfire upper is based upon (Ceiner, 261 ,etc)? Also does the DPMS have a true chamber reamed into the barrel or does the cartridge chamber in the adapter?

I did a search on DPMS put didn't find what I was looking for within the last 30 days.

What type of accuracy has been obtained with this upper at 50 yards? Thanks.
Link Posted: 10/29/2004 8:24:09 AM EDT
Look at the Jan-03 American Rifleman...

It is a Colt 22LR conversion, but the adapter is just a doughnut, with the doughnut sliding over the barrel filling the middle, and has a std chamber directly in the barrel..... Very simple solution when you see it.
Link Posted: 10/29/2004 12:25:19 PM EDT
I'm getting around 1" groups or better @ 50 yards with mine (M4). Best 50 yard group so far was .665, IIRC. It's prolly my most accurate .22 automatic rifle.
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