I picked up two of these Toolcraft BCG’s as spares for only $72 each.
They are surprisingly well made for that price point.
BCG1:
Marked C158 / MPI
Finish Nitride, very smooth
FP Protrusion .0325 - Passed
Shoulder Support Y2 - OK
Gas Ring Y1 - OK
Bolt tail G2 - Good
Staking - Good
30# reverse torque test - Passed
Carrier Key opening - In Spec
Extractor Spring - Good
Ejector Spring - Excellent
Came with Crane O-Ring (removed)
No YFS Key fasteners - Pass
BCG2:
Marked C158 / MPI
Finish Nitride, very smooth
FP Protrusion .0290 - Passed
Shoulder Support G1 - Excellent
Gas Ring G2 - Good
Bolt tail G2 - Good
Staking - OK, re-staked with MOAKS
30# reverse torque test - Passed
Carrier Key opening - In Spec
Extractor Spring - Good
Ejector Spring - Good
Came with Crane O-Ring (removed)
No YFS Key fasteners - Pass
Very pleased with the product and super fast shipping from Arm or Ally whom I’ve never bought from previously.
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