Short range report with the MAD (Moore Advanced Dynamics) Max MP5 Bolt:
- Price: $299.
- Installed in Omega OMR-9 (MP5 clone) to cure persistent failures to eject (FTEs).
- Bolt gap with this bolt remained same as original bolt.
- Genuine Heckler and Koch 10 round MP5 magazine used in testing (Calfornia compliant).
- The MAD bolt has an extractor spring
under the extractor claw, with a pin holding the extractor in place. I believe this results in (1) a firmer extractor grip and (2) less overtensioning of the extractor spring. In contrast, the original bolt has the extractor spring
above the extractor claw.
- Per the manufacturer, the extractor spring change interval is 15,000 rounds. They don't yet sell spare springs, but I hope they will do so in the future.
RESULTS
- 20 rounds Winchester 9mm +P NATO brass ammo: 3 FTEs (spent casings stuck in chamber, preventing chambering of next round).
- 50 rounds Blazer 9mm brass 115 grain: Perfect shooting-ejecting-cycling.
- 50 rounds Geco 9mm brass 115 grain: Perfect shooting-ejecting-cycling.
- 40 rounds Fiocci 9mm brass 115 grain: Perfect shooting-ejecting-cycling.
- 20 rounds Remington 9mm brass 124 grain: Perfect shooting-ejecting-cycling.
- Aside from the Winchester NATO 9mm +P ammo, all the other ammo functioned 100%. This bolt looks
very promising from my small sample of 180 rounds.
- In contrast, with the original bolt, my OMR-9 was having several FTEs per box with all the above ammo, except the Remington 124 grain, which had a FTE rate of 1 per 300.
- With this new MAD bolt, some ammo now felt "underpowered" (i.e. I was able to perceive longer cycle times from round to round). The Geco and Fiocchi felt underpowered while the Blazer and Remington "felt right" (cycling was quicker, stronger, with more pulse). I was not able to get this perception with the original bolt. The Remmy 124 grain felt the best. Regardless of how the ammo "felt" to me, the Blazer, Remington, Geco, and Fiocchi ammo all worked well.
- I am a little leery of running steel case ammo (e.g. Wolf) because I don't know if would be safe for the bolt. I will shoot only brass rounds for now.
- For a more complete test, I will running 500 rounds of Aguila 9mm 124 grain brass ammo soon. If I can get 500 rounds of this (or any other 9mm ammo) to fire with no problems, I will officially declare the MAD Max Bolt to be a winner. Will post results of this test.
- I think we have a real game changer here. I am hoping that, with the right ammo, my Omega OMR-9 can attain Glock-like reliability.