SAMOON GHK M4 Adjustable Enhancement Buffer + Piano-Wire Powerful Recoil Spring

• Description: LAHOK M4 Adjustable Enhancement Buffer + SAMOON Piano-Wire Powerful Recoil Spring
• The original weighs of buffer rod is 90g, this enhanced version is about 165g, which increase blowback recoil a lot.
• This product includes:   LAHOK M4 Adjustable Stainless Steel Recoil Force Enhancement Buffer*1 SAMOON piano-wire powerful recoil spring*1