Fed Arms Type-1 Metric Receiver Problems

[TNT ARmoury]

Got my receiver yesterday. All three of my locking shoulders fall right in. No tension to hold them in. Do I order an oversize shoulder, send it back, or peen-down the metal around the locking shoulder recess?

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TNT ARmoury
http://tntarmoury.homestead.com/TNT1.html

[Noname]

Don't dick with receiver! Send it back or get oversize LS. TDW has oversized LS's. If you attempt to peen it FED ARMS won't take it back.

[W.E.G.]

btt