UHC MP5 SD3 – Econo Airsoft Review
UHC MP5 SD3 Spring Airsoft SMG
(UA-312)
- Modeled After: Heckler & Koch MP5SD3
- Hop-Up: Fixed for .2g 6mm
- Lowest Advertised: 275 FPS / 110ft Range
- Purchased from AirSplat.com for $35 +$13 Shipped
 Accuracy Range Customizable Solid rugged design |
 Awkward when not fully extended Non-ambidextrious grip Small/Explosive Stock Magazine Sites bad for skirmish |
A while back, the UHC MP5 SD3 was the crowned prince of spring “rifles”. (A title only prestigious for those airsofters not in competitive CQB, of course.) It’s only competition came in the form of the HFC MP5 A5 v2, which had slightly worse performance, and tended to jam more frequently.
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Of course, now that the new kid on the block, UTG, is coming out with a whole bunch of pretty good guns, their spring pump MP5 A4/A5 CQB delivers comparable performance and a hi-cap clip for only $10 more, the UHC may have met it’s match. But, there are still a few factors that make the UHC MP5 a great and unique deal.
The most noticeable characteristic is the bad-ass mock suppressor that can be attached to the gun. Unlike most airsoft silencers, this one actually functions to extend the barrel by more than 6 inches, increasing accuracy and range. The gun itself looks slightly strange without the silencer, but it’s still an option.
The stock of the SD3 is also adjustable, though it only features 2 settings, in and out. Having the stock in and the silencer off makes this a very compact weapon, where as extending both brings you up to rifle-length while retaining pistol weight. This customizability is definitely a perk.
The MP5′s rotary diopter rear site is adjustable for windage and how accurate you want to be. Regardless of it’s cool name, this type of site simply isn’t feasible for skirmishes and are hard to use in certain lighting conditions. If I had to use this gun in a backyard match, I would attach a red-dot to the top dovetail mount. (Which has very little depth and is quite precarious).
Left: Stock magazine with built in funnel-loader. Right: HFC 40 round magazine with the top sanded down slightly.
Other than less than stellar iron-sites, the only other drawback of this gun is the magazine design. The stock UHC MP5 SD3 mag holds 21 rounds topped off and doesn’t have any sort of blockage to keep them from falling out. If you tip it, they will fall. This makes multiple clips hard to deal with unless you’re a pro with duct tape. The cocking system (handle on the left side of the gun) allows for a pretty high rate of fire, and those 20 or so rounds can go fast. This is where the HFC’s 40 round clip comes in handy. Get one of these and sand just the top down a minute amount for almost flawless compatibility. The HFC clip has two rows of 20 rounds, one that releases as you lock it into the gun, and one that you manually release once your first row is exhausted. Doubling the capacity is nice, but frequent jams with this mechanism tempted me to go back to the original mag and speed load it. One other gripe regarding the clip, is that due to it’s lack of any sort of stoppage, releasing a magazine that isn’t empty from the gun without locking down the spring first will result in your ammo spraying up inside the gun and everywhere else. Trust me, friends will do this all the time.
Overall, the accuracy, consistency, customizability and bargain price of this spring gun make it one of the best longer-range spring options available. It’s a great step up from spring pistols and, as always, won’t break your bank. With the silencer, this thing looks awesome as well. Modeled after the iconic SMG, it looks and feels solid. Range is impressive when using the suppressor and the power will definitely draw blood if you’re not careful. How fun!
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[...] .2g rounds, and while the FPS is about the same, this gun has better accuracy and range than my MP5SD3. This is aided by it’s long barrel, and a very nice set of iron sites. I had to shoot this [...]