Robinson Arms XCR 7.62x39 pistol mags:
Confirmed .223 capacity - 13rds max, but won't seat on a closed bolt with 13rds loaded
Confirmed 6.8SPC capacity - 11rds max
Feeding issues - feeding issues reported on .223 where rounds fit loosely in mag, and last few rounds 'jump out'. No feeding issues reported with 6.8SPC.
Construction - metal only
(Thanks to Easysauce & Waynetheman & Blaxsun for this info!)
Alexander Arms .50 Beowulf pinned 5rd rifle mags:
Confirmed .223 capacity - up to 15rds in metal mags, up to 18rds in polymer mags. Will seat on closed bolt
Feeding issues - none reported on metal mags based on 8 mags tested in 3-gun competition with avg of 25rds put through each mag. On polymer mags the follower can stick, but can be fixed by lubricating
Construction - Metal and Polymer versions available
(Thanks to Sosa & Blaxsun for this info!)
Small revisions (copy/paste):
Robinson Arms XCR 7.62x39 pistol mags:
Confirmed 7.62x39 capacity -
10rds max, will seat on a closed bolt.
Confirmed 5.56mm capacity -
13rds max, won't seat on a closed bolt.
Confirmed 6.8SPC capacity -
11rds max, will seat on a closed bolt.
Feeding issues - feeding issues reported on .223 where rounds fit loosely in mag, and last few rounds 'jump out' (only fix is a modified 5.56 follower). No feeding issues reported with 6.8SPC.
Notes - using an aftermarket base plate (such as a Magpul Ranger plate) will reduce the capacity by one for any calibre. These are ideal for bench-shooting.
Construction - metal only.
Suppliers - wolverinsupplies.com (in-stock)
Alexander Arms .50 Beowulf rifle mags (10/5):
Confirmed 5.56mm capacity - up to
15rds in metal mags, up to
16rds in polymer mags. Both will seat on a closed bolt.
Feeding issues - none reported on metal mags based on 8 mags tested in 3-gun competition with avg of 25rds put through each mag. On polymer mags the follower can stick, but can be fixed by lubricating.
Construction - metal and polymer versions available.
Suppliers - armtac.com (pre-order only at this time)