FWIW ... the white "L"-shaped plastic vice block offered by DSG that supposedly works with "all AR10(s)" and AR15(s) does NOT fit the mag well of the new ArmaLite AR10 model DEF-10.
Doesn't even come close to fitting the mag well at all. This part sells from their website for about $47.00 and although it seemed just fine on the AR15 side it appears will only work in the AR10 mag wells that took the steel M14 mags.
I say this because I tried to fit this to my Spikes Tactical ST-10 and it didn't fit that mag well neither. Both lowers accept the new PMAGS and NOT the former AR10 steel M14 mags.
I sent it back yesterday for a full refund and asked them to amend this item's description on their website in hopes of saving future DEF10 buyers/owners from the same drama.
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