Sigma M4 Caliber Liner

Sigma liners are designed to be used with the Sigma airgun silencer.CNC to .02-+ tolerances, this Liner allows for a quick change of caliber for the quietest silencer possible.  One housing multi-caliber
Product specifications:
Length; 168MM
Outside Diameter;
Weight –
Product includes:
1x Liner (2x spear o-rings)
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