RCM RCM-GP-LP90 #28 80-degree locking piece for 9mm HK roller-lock firearms.
The #28 80-degree locking piece is recommended when shooting 147gr subsonic ammunition with a full volume suppressor in your SP5K, SP89, reverse-stretch or similar 9mm roller-lock firearm.
Please note that not all ammunition/suppressor combinations will require the #28 80-degree LP. The RCM #28 80-degree locking piece may also be used in full-sized 9mm roller-lock firearms. It is intended for use when the cyclic rate of the firearm needs to be slowed down in order to maintain a safe and reliable operating condition.
9MM MP5 SERIES LP REFERENCE (NON SD)
- #28 80-degree
- 100-degree (no number assigned)
- #16 110-degree