Things I liked:Easy to use; battery is easy to insert into gunstock; fairly lightweight (approx. 4 lbs) for young users. Very cool looking- special forces light machine gun- my son really likes the look, very authentic Things I would have changed:If you want to attach a sling, you can't use the bracket on the gunstock because the clip won't fit; you have to make sure the sling you purchase comes with additional attachments. FYI, the UTG Deluxe Multi-functional tactical rifle sling listed in your catalog does the trick ($9.95). What others should know:Expensive (around $250), but you get the HK-quality and name, plus all metal body and gear box.
Things I liked:Charges fast, holds a charge for a good time, easy to fit into air gun Things I would have changed:nothing What others should know:Recommend using a charger that turns off when your battery is fully charged, so you don't have to try and calculate charging time
Things I liked:compact Things I would have changed:ability to turn off when battery fully charged What others should know:Recommend getting a charger that automatically turns off when battery is charged. This will save you having to calculate or estimate how long it will take to charge your batteries.