This is my official build list for advice and writing down tech notes. I decided to write this up as I don't see many build threads on ASF, and see a lot of threads asking for advice for their builds.
I ended up with a very good deal for a G&P Sentry (VLTOR model).
Remove the stock & buffer tube, put a G&P M16A2 stock to fit a very large lipo and quality FET
Remove the front RIS rail and gas block, replace with a Madbull Dragonfire 16.25 RIS system.
Will be using the Madbull rethreader tool to make the G&P threads match the Madbull RIS system threads.
Replace the stock barrel with a 14.5" outer.
Have a 195mm silencer to attach onto the 14.5" outer barrel.
G&P sniper grip
Here is a preview:
390-410 FPS w/ .2
Effective range of 300 feet
Very reliable GB with no headache of gearbox cracking
The following stuff have been put into the GB.
Modify POM piston head (debating on whether or not to remove the bearings to lose some weight)
Lonex red piston
Lonex SP120 spring
Riot/Seigetek 14.09:1 SSG
Ball bearing spring guide
Lonex A2 Titan Long motor
70D Sorbo buddy sorbo pad
Radiused cylinder window corners
Everything else stock.
These have been put infront of the gearbox, or behind:
Custom made shock transfer system (based off the forums here)
455mm 6.03 Prometheus TBB
Prowin Hop chamber for M4
Modify Baton Ryusoku AEG Flat-Type Hop-Up Rubber Set (Hop rubber has the mould removed, will use the nub to provide tension to the rhop in the Prowin hop chamber)
ExtremeFire Cheetah 2N w/ triggermaster software installed (Will be using the configuration Safe-Semi-Burst---Full Auto)
16AWG low resistance wiring
And the battery pack to power this:
11.1v 35C 3200mAh lipo. No, I'm not going with a small buffer tube lipo. I want to ensure the motor gets 100% of the power needed (better to over power the motor then under power it as the motor only takes what it needs).
Prediction: Will use the Triggermaster software in the FET to program the motor speed down to a reasonable 25-30rps.
Prelimary testing with this setup on the G&P M120 stock motor (was going to compare to the Lonex A2) using a 8.4v mini NiMH yielded 25 rps. Proceeding to a 9.6v mini NiMH, 30 rps was acheived. A second burst was applied to check the rps again. I hear a "clank" and the gun stops running.
Opening the gearbox, I have stripped some teeth off of the spur gear. Yes, I broke a set of Siegetek gears LOL. No, it was not a bad shim job.
Here are the pictures:
Contacting the retailer and Danny from Siegetek, I'll be getting replacements mailed to me as soon as they receive the ones I send them.
Thoughts on why this could have occured:
Lonex piston to heavy
Lemon spur gear (most likely)
Stock G&P 8mm bearings
What I will be doing to prevent it from happening again:
Swiss cheese the current Lonex red piston, OR using the SHS vented 14 teeth piston
Sand down the shells rails and the guides on the piston to ensure super smooth movement
Possibly replace stock bearings with Modify Tempered steel busing.
So far after a month of waiting for parts, and putting everything together, this is where I am.
I currently am waiting for the replacement gear to come, and most of the externals.
Hope you guys enjoyed this writeup! I will be updating this thread when I have made an improvement/get results in.