JMac Customs TS-8R Triangle Stock with 1913 Folding Mech 8in Black TS-8RP+FM-SM-1913. (T)riangle(S)tock(8)inch(R)ise with our own 1913 folding mech (not assembled) Attaching a stock to a pistol makes it an SBR and requires NFA approval. You are...