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Uses the 12 gram CO2 - a bit cheaper! (Can also convert to bulk air).Realism: Again, the Baikal Drozd IZH MP-661K is not a replica, but it does look like a sub machine gun in many ways, I'm really just not sure exactly what it looks like but when you are shooting this gun you really don't think much about this point because you are too busy grinning! Pros: There are a fair amount of metal components like the factory barrel, most of the magazine and many internal parts. With metal streaming out the barrel like that you are pretty much going to hit whatever you point it at, the odds are in your favor! Build Quality: This is a typical Russian made gun, all business and less importance put on looks but even so it is visually appealing, at least to me! Everything works exactly as it should and even though the main shell is plastic it is really a weapons grade polymer so there is no cause for concern here. But when I did my actual video accuracy test, the Drozd did not perform as well, getting more like a 2 inch group, still very reasonable for a gun that can shoot 600 rounds per minute out of the box and 1200 rounds per minute when modified. Accuracy: When I was sighting the Baikal Drozd in I got several 5 shot groups well within 1 inch 30 feet out from the target. This is how the single fire and burst fire rates are achieved. The solenoid pulsates in turn hitting the CO2 valve release. Type: Manufacturer: Model: IZH MP-661K Materials: Metal & Polymer Weight: 3.5 pounds Barrel: 8 inches, metal-rifled Propulsion: CO2 or (Bulk air with adaptor) Action: Electronic trigger with 1-3-6 round burst & 300-340-600 Rounds Per Minute Ammunition Type: 4.5mm steel BB's Ammunition Capacity: 30 rounds FPS: 360-500 Trigger Pull: The trigger pull on the IZH Drozd is nice and light due to the fact that the trigger is not mechanical but is instead an electronic on-off switch that operates a solenoid. With my 40th birthday fast approaching and my recent move from urban Los Angeles back to rural Pennsylvania, I found myself nostalgically yearning for the playthings of my early teens in the acreage of my dad's old farm house: a bb gun. If you do increase the shim thickness, be sure to check that the valve body and barrel bushing matting surfaces are flat and parallel to each other and everything including the solenoid still lines up along the barrel axis. We ship from Izhevsk, Russia.The Drozd Blackbird Fully Automatic BB Machine Gun & Its Many Modifications. For reference, each shim in the Blackbird is approximately 0.6mm thick for a total stacked thickness of 1.2mm. If you end up stacking shims, once you've got a good combination that achieves sufficient thickness, you could bond them together using epoxy or similar to create a single solid shim so you don't have to worry about losing a portion of it. plastic or metal washers, aluminum coil stock/flashing, or plastic of sufficient thickness could also be cut to fit. Almost anything could be made to work as a shim, e.g. Alternatively, you could add additional shims that sit in front of the barrel bushing (shown in above photo) or replace your existing shims with thicker ones. If your barre| breech is excessively long (OEM Barrels have been found to have inconsistent threaded breech lengths) causing greater than 1mm of seal protrusion and/or binding when inserting the mag, removal of material from the breech end of the barrel to reduce its length would be the best solution. Upon insertion of the mag, the seal will be compressed by the gap amount, creating a tighter seal. NOTE : For best performance, the seal should protrude from the rear of the barrel bushing leaving an air gap of approximately 0.5 - 1mm, between the seal rim and the barrel bushing. Mason Dawson has performed a test, comparing the OEM Amber, OEM Black, Early Prototype, and Final Production Seal being offered now. The BB is maintained along the central axis of the bore by the extended length seal until entering the barrel.Įach kit includes 1 seal that have been coated with silicone grease. Offers greater barrel breech protection compared to OEM seal by eliminating the freebore distance, inside the barrel bushing, that the BB would normally travel before entering the barrel.Designed to withstand extreme pressures of 1600+ PSI and remain flexible at subzero temps encountered during sustained high rates of fire or when using CO2.Significantly reduces shot-to-shot muzzle velocity extreme spreads resulting in more consistent shot velocities and improved accuracy, compared to OEM seal.Creates a tighter seal between the barrel bushing and valve body, reducing air leakage and increasing muzzle velocity, compared to OEM seal.High performance breech seals (Qty 1) for Baikal MP-661K Drozd (Blackbird or Bumblebee).