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Hello! I am in the process of upgrading my Elite Force/Umarex Tavor-21 Elite. Overall, I love the rifle. I like the feel, the weight, and how reliable it is. I am posting because I have some questions regarding upgrading and the gears that I can't find answers for. When I first disassembled my gearbox, all of the gears looks like the teeth had been scrapped and shaved. They worked fine, but they definitely saw some wear after only two games. I thought re-shimming would do the trick, so I began to shim, and it helped a lot with the sound! I recently ordered some other upgrade parts to help with the air compression in the cylinder, as the stock part was an all-in-one cylinder+cylinder head, a terrible air nozzle without a o-ring, and a piston that whiffed through through the cylinder without any resistance. I cracked it open again after fielding it for the 3rd time, and the gears still seemed to take some wear and tear. (I'm currently running an M120 irregular spring, different from the M110 regular) I want to make sure my Tavor handles 450-500 fps, as I'm building my own field with a collection of friends, and (we like the battle scars) we prefer to play at higher fps's. My question is, what type of high-torque gears that are regular spurs and not helical, would you recommend? I'm looking into the High Torque/High Speed Lonex short-type motor, but all the gears I'm looking for that have 4-star+ ratings are helical, and I don't want to go cheap on the gears. I'm not interested in the HElical gears, as that means I've have to get a new piston and spend more time shimming, and I've already shimmed the stock gears to the best of my ability. I just installed some new parts, and would hate to have to order different parts just to fit new gears. Below are the upgrades I've already made. Note: These parts have totally satisfied me, and have improved the air compression and accuracy of my rifle. I'm running a 7.4 lipo, but the ROF is WAY down, and when checking the parts after test firing, the wires were considerably warm. Angel Custom "Aegis" High Performance Polycarbonate AEG Piston with Steel Teeth (Model: AC-PT-AEG02) Modify Baton Ryusoku Flat Hopup Bucking Spacer for Airsoft AEGs (Model: BU-Baton-R) Lonex 6.03mm Steel Tight Bore Precision Barrel for AEG (Length: 509mm) (Model: BRL-LX-GB-03-10) Matrix CNC High Performance Aluminum Air Seal Nozzle For M4 M16 PKM Airsoft AEG Series (Model: Noz-Alum-M4) AIM / Guarder Polycarbonate Ventilation Piston Head For Airsoft AEG Guns (Model: PH-GE-04-03) ASG Lonex AEG Gearbox CNC Aluminum Cylinder Head - Ver. 2 (M4 / M16 / SCAR / MP5) (Model: CH-ASG-16603) Angel Custom CNC Advanced Stainless Ribbed Airsoft AEG Cylinder - Full Length (Model: AC-CYD-R05) The other thing is, with the new Air Nozzle, it's got a REALLY tight fit, even with a bit of lubricant. So much that I'm worried it's going to put added stress on the tappet plate/gears. Is this common? I'm positive I have the right size and style, but it appears that the O-ring on the inside of the air nozzle is the culprit of the friction. Can anyone give me advice or point me in the right direction? I've tried searching this forum and others, but I can't find the proper answers I'm looking for. Thank you for viewing, and I'd really appreciate a comment, even if it's a 'Hey jerk, you should have checked here: <link>". I'm looking to make my rifle perfect, so any help is wonderful. Thanks, - Jake "Napoliane"
I am going to purchase the Umarex IWI Tavor TAR-21 (Elite Series) and am planning to change a bit externally. The Elite Series version has a 20 in outer barrel that sticks out quite a bit, but allows for a 508 mm inner barrel. I want to keep that inner barrel, but use a shorter outer barrel with a barrel extension. The simple solution would be a 16 in barrel, which would end just outside of the receiver, paired with a short barrel extension (4 or 5 inches). However, looking at the AEG, I have noticed a large opening in the receiver where the outer barrel exits. Can anyone with access to a Umarex (or Elite Force or S&T) Tavor tell me how wide (horizontal diameter--it is an ellipse where the horizontal distance will be the smallest and most limiting) and deep the opening is? I am considering getting a shorter outer barrel (approx. 14 in) and a longer barrel extension (approx. 7 in), such that the barrel extension is recessed in the opening and has the appearance of being an integrally suppressed rifle. Thank you! Edit: Does the Tavor take special outer barrels? A reply from an airsoft shop said that there is no way for me to use any barrel but the two from the different versions of the Tavor.