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In preparation for a suppressor I started looking for a German #28 LP. I suppose I was put off by the crazy price of that part and decided to try the RCM part.
Here are pics of the 4 LPs I own.
Top is the Zenith MKE 110 degree LP that came with a Z-5P. Next one down is used German 100 degree LP. Then the HK Parts marked as PDW, then the RCM.


Measured Bolt Gap:
MKE 0.33mm
HK 0.35mm
RCM 0.60mm
HKParts 0.30mm
Left is RCM, right is HK Parts.


I had to buy -2 rollers for the RCM LP (which got me a 0.50mm Gap). I shot with both 147gr and 124gr, unsuppressed. I did have 2 malfunctions with 147gr but overall it functioned ok. 124gr was good.
Too much time on my hands and really hoping to stick with standard rollers, I decided to spend $35 and try the new HK Parts #28 LP when I noticed it on their website. Have not shot with it yet.
QUESTION:
Should I stick with the RCM LP and -2 roller at maximum gap?
Shoot the HK Parts at 0.30mm gap with standard rollers?
Or buy +2 rollers and the HK Parts for ~0.40mm Gap?
Pros or cons for each of the above setups appreciated! Hopefully the suppressor gets out of jail in the next few weeks.
Here are pics of the 4 LPs I own.
Top is the Zenith MKE 110 degree LP that came with a Z-5P. Next one down is used German 100 degree LP. Then the HK Parts marked as PDW, then the RCM.


Measured Bolt Gap:
MKE 0.33mm
HK 0.35mm
RCM 0.60mm
HKParts 0.30mm
Left is RCM, right is HK Parts.


I had to buy -2 rollers for the RCM LP (which got me a 0.50mm Gap). I shot with both 147gr and 124gr, unsuppressed. I did have 2 malfunctions with 147gr but overall it functioned ok. 124gr was good.
Too much time on my hands and really hoping to stick with standard rollers, I decided to spend $35 and try the new HK Parts #28 LP when I noticed it on their website. Have not shot with it yet.
QUESTION:
Should I stick with the RCM LP and -2 roller at maximum gap?
Shoot the HK Parts at 0.30mm gap with standard rollers?
Or buy +2 rollers and the HK Parts for ~0.40mm Gap?
Pros or cons for each of the above setups appreciated! Hopefully the suppressor gets out of jail in the next few weeks.