Table:
text: AR-15 variants
Diemaco/Colt Canada models
Diemaco/Colt Canada models
Colt_model_no_ Diemaco_model Stock Fire_control Rear_sight Forward_assist Barrel_length Barrel_profile Barrel_twist Hand_guards Bayonet_Lug Muzzle_device
N/A C8FT Canadian 3rd Generation S-1-F Weaver Yes 14.5 in. A1 1:7 Short Ribbed Yes A2
N/A C8FTHB Canadian 3rd Generation S-1-F Weaver Yes 14.5 in. A2 1:7 Short Ribbed Yes A2
N/A SFW Canadian 3rd Generation S-1-F Weaver Yes 16 in. SFW 1:7 Short Ribbed Yes A2
N/A C8CQB Canadian 3rd Generation S-1-F Weaver Yes 10 in. A2 1:7 Short Ribbed Yes A2

Question: What is the maximum barrel twist value for AR-15 variants when the barrel profile is SFW? How is this value achieved for the Diemaco Colt Canada models?